using System;

using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.X509;

namespace Org.BouncyCastle.Asn1.Ocsp
{
	public class RevokedInfo
		: Asn1Encodable
	{
		private readonly DerGeneralizedTime revocationTime;
		private readonly CrlReason revocationReason;

		public static RevokedInfo GetInstance(
			Asn1TaggedObject	obj,
			bool				explicitly)
		{
			return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
		}

		public static RevokedInfo GetInstance(
			object obj)
		{
			if (obj == null || obj is RevokedInfo)
			{
				return (RevokedInfo) obj;
			}

			if (obj is Asn1Sequence)
			{
				return new RevokedInfo((Asn1Sequence) obj);
			}

			throw new ArgumentException("unknown object in factory: " + obj.GetType().Name, "obj");
		}

		public RevokedInfo(
			DerGeneralizedTime revocationTime)
			: this(revocationTime, null)
		{
		}

		public RevokedInfo(
			DerGeneralizedTime  revocationTime,
			CrlReason           revocationReason)
		{
			if (revocationTime == null)
				throw new ArgumentNullException("revocationTime");

			this.revocationTime = revocationTime;
			this.revocationReason = revocationReason;
		}

		private RevokedInfo(
			Asn1Sequence seq)
		{
			this.revocationTime = (DerGeneralizedTime) seq[0];

			if (seq.Count > 1)
			{
				this.revocationReason = new CrlReason(
					DerEnumerated.GetInstance((Asn1TaggedObject) seq[1], true));
			}
		}

		public DerGeneralizedTime RevocationTime
		{
			get { return revocationTime; }
		}

		public CrlReason RevocationReason
		{
			get { return revocationReason; }
		}

		/**
		 * Produce an object suitable for an Asn1OutputStream.
		 * <pre>
		 * RevokedInfo ::= Sequence {
		 *      revocationTime              GeneralizedTime,
		 *      revocationReason    [0]     EXPLICIT CRLReason OPTIONAL }
		 * </pre>
		 */
		public override Asn1Object ToAsn1Object()
		{
			Asn1EncodableVector v = new Asn1EncodableVector(revocationTime);

			if (revocationReason != null)
			{
				v.Add(new DerTaggedObject(true, 0, revocationReason));
			}

			return new DerSequence(v);
		}
	}
}
